The TA6494 Series from TAMAGAWA SEIKI CO., LTD is a Reaction Wheel with Torque 20 mNm, Angular Momentum 0.2 to 0.3 Nms, Mass 1.1 Kg, Speed 4000 to 5000 rpm, Supply Voltage 5 V (Control), 15 to 28 V (Drive). More details for TA6494 Series can be seen below.